Ref (4) - 154B-WPC_111_301_1_-_A.pdf

The document is a detailed technical drawing from the Office of Naval Engineering for a Shell Expansion design, specifically drawing number 81340. The first page contains a comprehensive Bill of Materials and List of Shell Plates, with multiple columns listing part names, descriptions, materials, weights, and areas. The subsequent pages show multiple elevation and section views of the shell structure, including detailed technical specifications for various sections labeled from 10-H to 21-C. The drawing includes intricate structural details such as spray rails, transverse structures, and multiple geometric perspectives of the shell expansion, with precise measurements and annotations throughout the technical schematic.